How set dynamic array size in Oxygene (SetLength doesn't work)

What is the equivalent of SetLength using Oxygene? I'm trying to size an integer array.

var listIndexes: array of integer;
begin
     setLength(listIndexes,5);  // doesn't work
end;

Bill, the function Setlength does not exist in Delphi-Prism (you can use the namespace ShineOn.Rtl from ShineOn wich have a partial implementation of the Setlength function).

In delphi prism you can try this

type
IntegerArray = array of integer;

var listIndexes: IntegerArray;
listIndexes:=New IntegerArray(5);

or

 var listIndexes: Array of Integer;
 listIndexes:=New Integer[5];

UPDATE

Also, you can write your own SetLength

method SetLength(var myArray: Array of Integer; NewSize: Integer);
var 
ActualLength: Integer;
begin
  var DummyArray: &Array := &Array.CreateInstance(typeOf(Integer), NewSize);
  if assigned(myArray) then
  begin
    ActualLength:= iif(myArray.Length > NewSize, NewSize, myArray.Length);
    &Array.Copy(myArray, DummyArray, ActualLength);
  end;
  myArray := array of integer(DummyArray);
end;